package org.multiverse.stms.gamma.transactionalobjects.txnlong;
import org.junit.Before;
import org.junit.Test;
import org.multiverse.SomeUncheckedException;
import org.multiverse.api.exceptions.*;
import org.multiverse.api.exceptions.DeadTxnException;
import org.multiverse.api.exceptions.PreparedTxnException;
import org.multiverse.api.predicates.LongPredicate;
import org.multiverse.stms.gamma.GammaStm;
import org.multiverse.stms.gamma.transactionalobjects.GammaTxnLong;
import org.multiverse.stms.gamma.transactions.GammaTxn;
import static org.junit.Assert.fail;
import static org.mockito.Mockito.*;
import static org.multiverse.TestUtils.*;
import static org.multiverse.api.TxnThreadLocal.clearThreadLocalTxn;
import static org.multiverse.api.TxnThreadLocal.setThreadLocalTxn;
import static org.multiverse.api.predicates.LongPredicate.newEqualsPredicate;
import static org.multiverse.stms.gamma.GammaTestUtils.assertRefHasNoLocks;
import static org.multiverse.stms.gamma.GammaTestUtils.assertVersionAndValue;
public class GammaTxnLong_await1WithPredicateTest {
private GammaStm stm;
@Before
public void setUp() {
stm = new GammaStm();
clearThreadLocalTxn();
}
@Test
public void whenPredicateEvaluatesToFalse() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newTxnFactoryBuilder()
.setFat()
.newTransactionFactory()
.newTxn();
setThreadLocalTxn(tx);
try {
ref.await(newEqualsPredicate(initialValue + 1));
fail();
} catch (RetryError expected) {
}
assertIsAborted(tx);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenPredicateReturnsTrue() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newTxnFactoryBuilder()
.setFat()
.newTransactionFactory()
.newTxn();
setThreadLocalTxn(tx);
ref.await(newEqualsPredicate(initialValue));
assertIsActive(tx);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenPredicateThrowsException_thenTransactionAborted() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
LongPredicate predicate = mock(LongPredicate.class);
when(predicate.evaluate(initialValue)).thenThrow(new SomeUncheckedException());
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
try {
ref.await(predicate);
fail();
} catch (SomeUncheckedException expected) {
}
assertIsAborted(tx);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenNullPredicate_thenTransactionAbortedAndNullPointerException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
try {
ref.await(null);
fail();
} catch (NullPointerException expected) {
}
assertIsAborted(tx);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenNoTransaction_thenTxnMandatoryException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
LongPredicate predicate = mock(LongPredicate.class);
try {
ref.await(predicate);
fail();
} catch (TxnMandatoryException expected) {
}
verifyZeroInteractions(predicate);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenTransactionPrepared_thenPreparedTxnException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
tx.prepare();
LongPredicate predicate = mock(LongPredicate.class);
try {
ref.await(predicate);
fail();
} catch (PreparedTxnException expected) {
}
assertIsAborted(tx);
verifyZeroInteractions(predicate);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenTransactionAborted_thenDeadTxnException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
tx.abort();
LongPredicate predicate = mock(LongPredicate.class);
try {
ref.await(predicate);
fail();
} catch (DeadTxnException expected) {
}
assertIsAborted(tx);
assertRefHasNoLocks(ref);
verifyZeroInteractions(predicate);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenTransactionCommitted_thenDeadTxnException() {
long initialValue = 10;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
GammaTxn tx = stm.newDefaultTxn();
setThreadLocalTxn(tx);
tx.commit();
LongPredicate predicate = mock(LongPredicate.class);
try {
ref.await(predicate);
fail();
} catch (DeadTxnException expected) {
}
assertIsCommitted(tx);
assertRefHasNoLocks(ref);
verifyZeroInteractions(predicate);
assertVersionAndValue(ref, initialVersion, initialValue);
}
@Test
public void whenSomeWaitingNeeded() {
int initialValue = 0;
GammaTxnLong ref = new GammaTxnLong(stm, initialValue);
long initialVersion = ref.getVersion();
TxnLongAwaitThread thread1 = new TxnLongAwaitThread(ref, 10);
TxnLongAwaitThread thread2 = new TxnLongAwaitThread(ref, 20);
thread1.start();
thread2.start();
sleepMs(1000);
assertAlive(thread1, thread2);
ref.atomicSet(10);
assertEventuallyNotAlive(thread1);
assertNothingThrown(thread1);
assertAlive(thread2);
ref.atomicSet(20);
assertEventuallyNotAlive(thread2);
assertNothingThrown(thread2);
assertRefHasNoLocks(ref);
assertVersionAndValue(ref, initialVersion + 2, 20);
}
}